Lighting ballast



FIG. 1 shows a perspective view of a lighting ballast according to afirst embodiment of the present invention.

FIG. 2 shows a right elevation view of the lighting ballast of FIG. 1.

FIG. 3 shows a left elevation view of the lighting ballast of FIG. 1.

FIG. 4 shows a front view of the lighting ballast of FIG. 1.

FIG. 5 shows a rear view of the lighting ballast of FIG. 1.

FIG. 6 shows a top view of the lighting ballast of FIG. 1.

FIG. 7 shows a perspective view of a lighting ballast according toanother embodiment of the present invention.

FIG. 8 shows a right elevation view of the lighting ballast of FIG. 7.

FIG. 9 shows a left elevation view of the lighting ballast of FIG. 7.

FIG. 10 shows a front view of the lighting ballast of FIG. 7.

FIG. 11 shows a rear view of the lighting ballast of FIG. 7; and,

FIG. 12 shows a top view of the lighting ballast of FIG. 7.

The broken lines shown are for illustrative purposes and form no part ofthe claimed design.

The ornamental design for lighting ballast, as shown and described.